35.0k views
4 votes
7x+5y=-13
-2x=7y+26
Solve by elimination

User Achellies
by
7.0k points

2 Answers

4 votes

Answer:

Explanation:

7x + 5y = -13 ....multiply by 2

-2x - 7y = 26 .....multiply by 7

-------------------------

14x + 10y = -26 (result of multiplying by 2)

-14x - 49y = 182 (result of multiplying by 7)

-----------------------add

-39y = 156

y = -156/39

y = -4

7x + 5y = -13

7x + 5(-4) = -13

7x - 20 = -13

7x = -13 + 20

7x = 7

x = 7/7

x = 1

check...

-2x = 7y + 26

-2(1) = 7(-4) + 26

-2 = -28 + 26

-2 = -2 (correct)...it checks out

answer is : x = 1 and y = -4 or (1,-4)

User FloF
by
7.1k points
7 votes

Answer:

Point form : (1,-4)

Equation for, : x=1, y=-4

Step-by-step explanation: Add the fractions in order to solve for the first variable. Plug this vale into the other equations in order to solve for the remaining variables.

Hope this helps you out! ☺

User Ben Hunter
by
6.7k points